CN209015702U - The supply voltage compensation circuit and display device of display panel - Google Patents
The supply voltage compensation circuit and display device of display panel Download PDFInfo
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- CN209015702U CN209015702U CN201821741538.8U CN201821741538U CN209015702U CN 209015702 U CN209015702 U CN 209015702U CN 201821741538 U CN201821741538 U CN 201821741538U CN 209015702 U CN209015702 U CN 209015702U
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- supply voltage
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
Abstract
The utility model belongs to field of display technology, provides the supply voltage compensation circuit and display device of a kind of display panel；The supply voltage compensation circuit includes: control module, first switch module, second switch module and boost module；When the gate-control signal of display panel is closed, control module generates the control signal of the first level state；First switch module is connected by control signal and turns off second switch module；When the conducting of first switch module, compensated by supply voltage of the boost module to display panel, so that boost module can export compensated supply voltage, to ensure image quality in display panel；Therefore the utility model efficiently solve supply voltage compensation circuit in traditional technology compatibility it is poor, the problems in different industrial circles can not be suitable for.
Description
Technical field
The utility model belongs to the supply voltage compensation circuit of field of display technology more particularly to a kind of display panel and shows
Showing device.
Background technique
With the fast development of modern industrial technology, Thin Film Transistor-LCD (Thin Film Transistor
Liquid Crystal Display, TFT-LCD) have become essential electronic device in people's daily life, lead to
Crossing TFT-LCD can watch the information such as a variety of different images, video, to meet the visual demand of people；It is shown in TFT-LCD
In technology, display panel generally comprises data line and scan line, is wherein transmitted to display drive signals in data line and scan line,
When data line and scan line are all connected, display panel can receive complete Multiple-shower driving signal, and then more
Under the driving of road display drive signals, display panel can show the video of high definition, bring good visual experience.
However in the course of work of display panel, display panel is frequently necessary to be connected according to the actual demand of people
Or shutdown；When display drive signals display panel data line and scan line carry out transmission process in, data line and scanning
Multiple parasitic capacitances can be all generated in line, since these parasitic capacitances are connected to different voltage sources, according to capacitor two-plate it
Between law of conservation of charge, all parasitisms if the voltage of one of parasitic capacitance changes, in display panel
The voltage at capacitor both ends can all occur to change accordingly；Therefore the data line and scan line worked as in display panel are turned off moment,
Due to the coupling effect of capacitor, the supply voltage (Vcom voltage) that display panel is accessed will will be pullled, and work as display surface
When the Vcom voltage of plate reduces, the picture display that will lead to display panel is abnormal, reduces the visual experience of user.
In order to improve the supply voltage in display panel, technical staff usually requires to design special compensation circuit structure
The Vcom voltage for improving display panel, which is applied in display panel, and then is compensated by the compensation circuit
The Vcom voltage of display panel；However the supply voltage compensation circuit in traditional technology is the prior art has at least the following problems: due to display
Internal circuit configuration has varied in panel, and the circuit structure of traditional supply voltage compensation circuit is fixed, by this
Compensation circuit can only play the effect of supply voltage compensation in a certain specific display panel, and compatibility is extremely low；And tradition
Supply voltage compensation circuit it is low for the compensation precision of the Vcom voltage of display panel, different industrial circles can not be suitable for
In, reduce the picture display effect of display panel.
Utility model content
The utility model provides the supply voltage compensation circuit and display device of a kind of display panel, it is intended to solve traditional skill
Vcom voltage compensation precision is low in art and the compatibility of Vcom voltage compensation circuit is lower, can not be suitable for different types of
In display panel, narrow scope of application leads to the problem that video display quality is poor in display panel.
The utility model first aspect provides a kind of supply voltage compensation circuit of display panel, comprising:
Control module, when the gate-control signal of the display panel is closed, the control module generates the first level state
Control signal；
The control of first switch module, the first switch module terminates the control module, the first switch module
The first conducting terminate the supply voltage output end of the display panel, the first switch module is the in the control signal
It is connected when one level state；
The control of second switch module, the second switch module terminates the control module, the second switch module
The first conducting terminate the second conduction terminal of the first switch module, the second conduction terminal ground connection of the second switch module,
The second switch module is connected when the control signal is second electrical level state；
Boost module, the voltage input of the boost module terminates the supply voltage output end of the display panel, described
The boosting rectifier control of boost module terminates the second conduction terminal of the first switch module and the first of the second switch module is led
Go side, the boost module compensate the supply voltage of the display panel when the first switch module is connected and defeated
Out.
In one of them embodiment, the first switch module includes at least one first switch tube, and described second
Switch module includes at least one second switch.
In one of them embodiment, the first switch module includes a first switch tube, the second switch
Module includes a second switch；
Wherein, the control electrode of the control electrode of the first switch tube and the second switch is connected to the control mould altogether
Block, the first conducting pole of the first switch tube connect the supply voltage output end of the display panel, the first switch tube
First conducting of the second conducting pole and the second switch is extremely connected to the boost module altogether, and the second of the second switch
Pole ground connection is connected.
In one of them embodiment, the control module includes:
Singlechip chip, the singlechip chip connect the control terminal and the second switch module of the first switch module
Control terminal, the singlechip chip generates the control signal according to operational order.
In one of them embodiment, the control module includes:
First DC power supply is exported in direct current energy；
The power input of clock circuit, the clock circuit terminates first DC power supply, the letter of the clock circuit
Number output terminates the control terminal of the first switch module and the control terminal of the second switch module, and the clock circuit generates
Clock signal.
In one of them embodiment, the boost module includes:
Boost capacitor；
First diode；And
Second diode；
Wherein, the anode of the first diode connects the supply voltage output end of the display panel, the first switch
First conduction terminal of the second conduction terminal of module and the second switch module is connected to the first end of the boost capacitor altogether, described
The anode of the cathode of first diode and second diode is connected to the second end of the boost capacitor, the two or two pole altogether
The cathode of pipe exports compensated supply voltage.
In one of them embodiment, further includes:
Voltage stabilizing module, the Voltage stabilizing module are connected between the voltage output end and ground of the boost module, the pressure stabilizing
Module carries out steady pressure treatment to compensated supply voltage.
In one of them embodiment, the Voltage stabilizing module includes at least one electric capacity of voltage regulation.
In one of them embodiment, the Voltage stabilizing module includes first capacitor, a termination institute of the first capacitor
State the voltage output end of boost module, the other end ground connection of the first capacitor.
The utility model second aspect provides a kind of display device, and the supply voltage including display panel as described above is mended
Repay circuit and display panel.
In the supply voltage compensation circuit of above-mentioned display panel, control signal can be exported by control module, wherein
The control signal can control the working condition of the supply voltage compensation circuit, when control signal be in the first level state or
When person is in second electrical level state, each circuit module in supply voltage compensation circuit is respectively at different working conditions；
If the control signal that control module is exported is in the first level state, the conducting of first switch module, second switch module is closed
It closes, the boosting rectifier control end of the boost module can be directly accessed the supply voltage of display panel, and then boost module is to power supply
Voltage plays boosting, so that boost module can export compensated supply voltage, avoids the power supply electricity of display panel
Pressure is lowered；Therefore when the gate-control signal closing of display panel, when the supply voltage of display panel is pullled, pass through boost module
The supply voltage of display panel can be accurately compensated for, and then data line and scan line in display panel is prevented to be turned off
When supply voltage reduce, ensured that display panel has access to the supply voltage of normal amplitude, enhanced picture in display panel
Effect, bring good visual experience to user；And the utility model need to only pass through the level state of control signal
The voltage compensation ability for controlling supply voltage compensation circuit, is adjusted without the internal power structure to supply voltage compensation circuit
Whole, the supply voltage compensation circuit in the utility model can be suitable for different types of display panel, and compatibility is extremely strong, can
It is widely applicable in different industrial circles；Efficiently solve the supply voltage compensation circuit of display panel in traditional technology
It is low for the compensation precision of supply voltage, different industrial circles can not be suitable for, compatibility is poor, and then leads to display panel
Picture effect it is poor, the bad problem of the visual experience of user.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, for those skilled in the art, without creative efforts, can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is a kind of modular structure of the supply voltage compensation circuit of display panel provided by the embodiment of the utility model
Figure；
Fig. 2 is the circuit structure of a kind of first switch module and second switch module provided by the embodiment of the utility model
Figure；
Fig. 3 is the circuit structure of a kind of first switch module and second switch module provided by the embodiment of the utility model
Figure；
Fig. 4 is the circuit structure of a kind of first switch module and second switch module provided by the embodiment of the utility model
Figure；
Fig. 5 is the circuit structure of a kind of first switch module and second switch module provided by the embodiment of the utility model
Figure；
Fig. 6 is a kind of circuit structure diagram of boost module provided by the embodiment of the utility model；
Fig. 7 is the modular structure of the supply voltage compensation circuit of another display panel provided by the embodiment of the utility model
Figure；
Fig. 8 is a kind of circuit structure diagram of Voltage stabilizing module provided by the embodiment of the utility model；
Fig. 9 is the circuit structure diagram of another Voltage stabilizing module provided by the embodiment of the utility model；
Figure 10 is a kind of function structure chart of display device provided by the embodiment of the utility model.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Fig. 1 shows the module knot of the supply voltage compensation circuit 10 of display panel provided by the embodiment of the utility model
Structure illustrates only part relevant to the utility model embodiment, details are as follows for ease of description:
As shown in Figure 1, supply voltage compensation circuit 10 includes control module 101, first switch module 102, second switch
Module 103 and boost module 104.
In the present embodiment, control module 101, for generating the first level in the gate-control signal closing of display panel
The control signal of state.
In the present embodiment, when the gate-control signal of display panel is closed, control module 101 generates the first level state
Control signal；When display panel is not turned off, control module 101 generates the control signal of second electrical level state.
In the present embodiment, the gate-control signal is used to control the display panel conducting or the pass of middle data line and scan line
It is disconnected；When the gate-control signal in display panel is closed, data line and scan line in display panel are turned off, display panel without
Method accesses display drive signals, and then display panel is in work halted state；Only when gate-control signal is not off, display
Data line and scan line in panel can constantly export display drive signals, can make to show by display drive signals
Panel realizes normal video display function；According to the internal circuit configuration in display panel, data line and scan line can all be deposited
In parasitic capacitance, if the voltage at the gate-control signal of display panel parasitic capacitance both ends in shutdown moment, display panel can all drop
It is low, the Vcom voltage of display panel can be made to be pullled, reduce the effect of picture in display panel；Therefore in the present embodiment,
When the Vcom power supply of display panel is pullled, supply voltage is played by control signal driving power voltage compensating circuit 10 and is mended
The effect of repaying improves the effect of picture in display panel, and then the present embodiment can be changed by controlling the level state of signal
The working condition of variable power source voltage compensating circuit 10, easy to operate, practicability is extremely strong.
As an alternative embodiment, the first level state of above-mentioned control signal is either refer to high level shape
State may also mean that low level state, not limit this；And control the first level state and second electrical level state of signal
Phase cross-over.
In the present embodiment, the control of first switch module 102 terminates control module 101, and the of first switch module 102
The supply voltage output end V1 of one conducting termination display panel, first switch module 102 are used in control signal be the first level
It is connected when state.
It in the present embodiment, can be by the Vcom electricity in display panel by the supply voltage output end V1 of display panel
Pressure is exported to first switch module 102；Wherein, when controlling signal is the first level state, first switch module 102 is connected,
When controlling signal is second electrical level state, first switch module 102 is turned off；Therefore, when control signal is in different level
When state, first switch module 102 is at corresponding working condition.
In the present embodiment, the control of second switch module 103 terminates control module 101, and the of second switch module 103
Second conduction terminal of one conducting termination first switch module 102, the second conduction terminal of second switch module 103 are grounded GND, and second
Switch module 103 is connected when controlling signal and being second electrical level state；
In the present embodiment, control module 102 can export control signal to the control terminal of second switch module 103,
And then the conducting or shutdown of second switch module 103 can be controlled by controlling signal；Specifically, when control signal is first
When level state, second switch module 103 is turned off；When controlling signal is second electrical level state, second switch module 103
It will be connected；Level state by controlling signal is the on-off of controllable first switch module 102 and second switch module 103
State, and there is antipodal control polarity is connected for first switch module 102 and second switch module 103；Therefore when the
When one switch module 102 and second switch module 103 are respectively at different conducting or off state, supply voltage compensation
Circuit 10 can realize corresponding compensating operation to the Vcom voltage of display panel.
In the present embodiment, the supply voltage output end V1 of the voltage input termination display panel of boost module 104, rises
First conducting of the second conduction terminal and second switch module 103 of the boosting rectifier control termination first switch module 102 of die block 104
End, when first switch module 102 is connected, boost module 104 is compensated and is exported to the supply voltage of display panel.
It in the present embodiment, can be by the Vcom voltage of display panel by the supply voltage output end V1 of display panel
It exports to the voltage input end of boost module 104, and then voltage compensation operation is carried out to Vcom voltage by boost module 104,
To prevent the gate-control signal of display panel the problem of turn-off transient Vcom voltage is lowered；Specifically, working as first switch module
When 102 conducting, boost module 104 is compensated and is exported to the Vcom voltage of display panel；When first switch module 102 turns off
When, boost module 104 can't compensate Vcom voltage, and boost module 104 does not play boosting；Work as display panel
In Vcom voltage by controlling signal first switch module 102 is connected when being pullled, and make second switch module 103
Shutdown, the supply voltage output end V1 of display panel are exported Vcom voltage to boost module by first switch module 102
104 boosting rectifier control end, due to the boosting of boost module 104, by boost module 104 to the Vcom voltage of display panel
It compensates, so that the amplitude of the Vcom voltage of display panel rises, and then the voltage output end of boost module 104 can
Compensated Vcom voltage is exported, is dropped with the Vcom voltage in display panel when preventing that gate-control signal is turned off in display panel
Low problem.
In the present embodiment, the i.e. controllable supply voltage of the level state for control signal being exported by control module 101
The working condition of compensation circuit 10, when gate-control signal is turned off in display panel, the Vcom power supply in display panel is pullled,
Control signal is the first level state at this time, so that first switch module 102 is connected, second switch module 103 is turned off, and is led to
The boosting for crossing boost module 104 is compensated and is exported by Vcom power supply of the boost module 104 to display panel, behaviour
Make simplicity, it is high for the compensation precision of Vcom voltage in display panel；To which the present embodiment can be by controlling in control module 101
The level state of signal processed is the voltage compensation effect of controllable supply voltage compensation circuit 10, to prevent from gating in display panel
Signal is the problem of shutdown moment causes Vcom voltage to decline to a great extent；When boost module 104 exports compensated Vcom voltage,
The picture of display panel can be made normal by the Vcom voltage, image clearly improves the visual experience of user；And this implementation
Supply voltage compensation circuit 10 in example is applicable in different types of display panel, and compatibility is extremely strong, is effectively improved aobvious
Show the amplitude of Vcom voltage in panel；The compatibility for solving supply voltage compensation circuit 10 in traditional technology is poor, and operation is not
Just, can not the Vcom voltage to display panel accurately compensated, traditional Vcom voltage compensation circuit can not be suitable for difference
The problem of industrial circle.
As an alternative embodiment, first switch module 102 includes at least one first switch tube, second switch
Module 103 includes at least one second switch, and then when first switch module 10 and the access control letter of second switch module 103
Number when, by the i.e. controllable first switch tube of the control signal and second switch is connected or shutdown, and then realizes for aobvious
Show the compensating operation of the Vcom voltage of panel；First switch module 102 and second switch module 103 in the present embodiment have spirit
The high circuit structure of activity.
As an alternative embodiment, switching tube in first switch module 102 is metal-oxide-semiconductor or triode etc.,
Switching tube in second switch module 103 is metal-oxide-semiconductor or triode etc., is not limited this；Illustratively, if first switch
Switching tube in module 102 and second switch module 103 is all metal-oxide-semiconductor, and wherein the switching tube in first switch module 102 is
PMOS tube, the switching tube in second switch module 103 are NMOS tube, and then when the grid of PMOS tube and the grid of NMOS tube are same
When incoming control signal, then can control PMOS tube by controlling signal and NMOS tube be in different on off operating modes, boosting mould
The compensating operation of the realization Vcom voltage of block 104.
As an alternative embodiment, Fig. 2 shows first switch modules 102 provided by the embodiment of the utility model
With the circuit structure of second switch module 103, as shown in Fig. 2, first switch module 102 includes a first switch tube M2, the
Two switch modules 103 include a second switch M2；Wherein, the control of the control electrode of first switch tube M1 and second switch M2
System is extremely connected to control module 101 altogether, and the first conducting pole of first switch tube M1 meets the supply voltage output end V1 of display panel, the
The second conducting pole of one switching tube M1 and the first conducting of second switch M2 are extremely connected to boost module 104, second switch altogether
The second conducting pole of M2 is grounded GND；It is opened when control module 101 exports control signal to the grid of first switch tube M1 and second
When closing the grid of pipe M2, the i.e. controllable first switch tube M1 and second switch M2 conducting of level state by controlling signal or
Person's shutdown, illustratively, as shown in Fig. 2, first switch tube M1 is PMOS tube, second switch M2 is NMOS tube, and then first
Switching tube M1 and second switch M2 has different conducting polarity, as first switch tube M1 conducting and second switch M2
When shutdown, Vcom voltage is passed through the first conducting pole of first switch tube M1 and the by the supply voltage output end V1 of display panel
Two conducting poles are transmitted to the boosting rectifier control end of boost module 104, and then can be to the Vcom of display panel by boost module 104
Voltage is compensated and is exported.
As an alternative embodiment, Fig. 3 shows first switch module 102 provided by the embodiment of the utility model
With another circuit structure of second switch module 103, as shown in figure 3, first switch module 102 include the one or three pole
Pipe Q1, second switch module 103 include a second triode Q2；Wherein, the base stage and the second triode of the first triode Q1
The base stage of Q2 is connected to control module 101 altogether, and the first conducting pole of the first triode Q1 connects the supply voltage output end of display panel
The second conducting pole of V1, the first triode Q1 and the first conducting of the second triode Q2 are extremely connected to boost module the 104, the 1st altogether
The second conducting pole of pole pipe Q1 is grounded GND；Illustratively, the first triode Q1 is NPN type triode, and the second triode Q2 is
The first triode Q1 is connected by controlling signal when gate-control signal is turned off in display panel in PNP type triode, and
So that the second triode Q2 is turned off, to drive boost module 104 that can realize voltage compensating function to Vcom voltage.
As an alternative embodiment, Fig. 4 shows first switch module 102 provided by the embodiment of the utility model
With another circuit structure of second switch module 103, as shown in figure 4, first switch module 102 includes at least two successively
Cascade first switch tube, second switch module 103 include at least two successively cascade second switches, illustratively, the
First switch tube in one switch module 102 is all PMOS pipe, and the second switch in second switch module 103 is all NMOS
Pipe；Wherein, in first switch module 102, the first conducting pole of first PMOS tube connects the supply voltage output of display panel
V1 is held, the second conducting pole of previous PMOS tube connects the first conducting pole of adjacent the latter PMOS tube, the last one PMOS tube
Second conducting pole connect boost module 104 and second switch module 103, the grid of each PMOS switching tube is connected to control altogether
Module 101 is used for incoming control signal；And then it can be controlled simultaneously by the control signal that control module 101 exports multiple
PMOS switch pipe is simultaneously turned on or is simultaneously turned off, only when all PMOS tube in first switch module 102 all simultaneously turn on
When, first switch module 102 is just connected, and boost module 104 can carry out boosting protection to Vcom voltage；Therefore the present embodiment is logical
At least two PMOS tube are crossed to carry out the conducting or shutdown of control first switch module 102, single PMOS pipe is avoided and accidentally touches
The problem of caused first switch module 102 misleads is sent out, the control stability of first switch module 102, Yi Jibao are improved
The physical security of supply voltage compensation 10 is hindered；Simultaneously in second switch module 103, the first conducting of first NMOS tube
Pole connects first switch tube 102 and boost module 104, and the second conducting pole of previous NMOS tube connects adjacent the latter NMOS tube
Second conducting pole of the first conducting pole, the last one NMOS tube is grounded GND, and then passes through the connection structure of at least two NMOS tubes
The on-off safety that can ensure second switch module 103, improves boost module 104 to the compensation precision of Vcom voltage, makes this reality
Apply the Vcom voltage compensation function that the supply voltage compensation circuit 10 in example can bring into normal play in display panel.
As an alternative embodiment, Fig. 5 shows first switch module 102 and second provided in this embodiment
Another circuit structure of switch module 103, as shown in figure 5, first switch module 102 includes at least two successively cascade three
Pole pipe, second switch module 103 include at least two successively cascade triodes；Due to first switch module 102 in Fig. 5 and
The circuit structure of two switch modules 103 is similar with circuit structure illustrated in fig. 4, thus in Fig. 5 circuit structure embodiment party
Formula can refer to the embodiment in Fig. 4, will not be described in great detail herein；Therefore the first switch module 102 and second in the present embodiment is opened
It closes module 103 and controls itself on-off using at least two switching tubes, greatly improve supply voltage in the present embodiment and compensate
The control precision of circuit 10, and then the compensated Vcom voltage of supply voltage compensation circuit 10 is enable to ensure the picture of display panel
Face quality reduces the compensation error of Vcom voltage.
As an alternative embodiment, control module 101 includes singlechip chip, singlechip chip connects first switch
The control terminal of module 102 and the control terminal of second switch module 103, singlechip chip are used to generate control letter according to operational order
Number.
Optionally, the model of singlechip chip are as follows: MDT10P509 89C52 family chip；And then user is mobile whole
It is input operation instruction in end, which includes the operation information of user, and mobile terminal and singlechip chip communication link
It connects, and then mobile terminal exports the operational order to singlechip chip, it can control single chip computer chip by the operational order
Working condition so that singlechip chip generate have varying level state control signal, driving power voltage compensating circuit
10 can be realized Vcom voltage compensation function；Wherein, which can be mobile phone or notebook；Therefore in the present embodiment
In, user can be directly changed the working condition of supply voltage compensation circuit 10 by operational order, and it is easy to operate, it helps to improve
For supply voltage compensation circuit 10 for the compensation precision of Vcom voltage, the controllability of control module 101 is extremely strong, draws in display panel
Face display effect more preferably, splendid usage experience is brought to user.
As an alternative embodiment, control module 101 includes in the first DC power supply and traditional technology field
Clock circuit, wherein the first DC power supply can DC power output, by the direct current energy can make control module 101 keep
Normal circuit function, the compensation for display panel Vcom voltage for improving supply voltage compensation circuit 10 in the present embodiment are stablized
Property, video/image in display panel being capable of display quality with higher always.
In the present embodiment, the power input of clock circuit terminates the first DC power supply, the signal output end of clock circuit
The control terminal of first switch module 102 and the control terminal of second switch module 103 are connect, clock circuit generates clock signal；When
When one DC power supply exports direct current energy to the power input of clock circuit, when clock circuit is generated according to the direct current energy
Clock signal (i.e. control signal), when clock circuit is by clock signal transmission to first switch module 102 and second switch module 103
When, first switch module 102 can be controlled by clock signal and second switch module 103 is connected or shutdown；When clock is believed
Number have different level states when, supply voltage compensation circuit 10 can realize different benefits to the Vcom voltage of display panel
Effect is repaid, and then the present embodiment can simply, efficiently control the Vcom electricity of supply voltage compensation circuit 10 by clock signal
Press compensation function.
Illustratively, the clock circuit includes the electronic components such as clock chip and crystal oscillator, optionally, clock chip
For DS1302, oscillation frequency clock is generated by clock chip, so that clock circuit can be exported with varying level shape
The clock signal of state can accurately control the working condition of supply voltage compensation circuit 10 by the clock signal；And then this
Control module 101 in embodiment generates clock signal using clock circuit, it is easy to accomplish, and since clock circuit has
The level state of good compatibility, output clock signal can also be adjusted arbitrarily according to the needs of users, greatly
The compatibility for improving control module 101 in the present embodiment enhances the scope of application of supply voltage compensation circuit 10.
As an alternative embodiment, Fig. 6 shows the circuit structure of boost module 104 provided in this embodiment,
As shown in fig. 6, boost module 104 includes: boost capacitor C1, first diode D1 and the second diode D2；Wherein, the one two
The anode of pole pipe D1 meets the supply voltage output end V1 of display panel, and the second conduction terminal of first switch module 102 and second is opened
The first conduction terminal for closing module 103 is connected to the first end of boost capacitor C1, the cathode of first diode D1 and the second diode altogether
The anode of D2 is connected to the second end of boost capacitor C1 altogether, and the cathode of the second diode D2 is for exporting compensated supply voltage；
Wherein the cathode of the second diode D2 is the voltage output end of boost module 104, passes through the voltage output end of boost module 104
Compensated Vcom power supply can be exported, display panel can be made to be in stable work shape by compensated Vcom power supply
State improves the display quality of picture in display panel, brings good visual experience to user.
Specifically, boost module in the present embodiment is described below in conjunction with above-mentioned Fig. 1 and circuit structure illustrated in fig. 6
104 for Vcom voltage boosting principle, it is specific as follows:
When the gate-control signal in display panel and when being not turned off, scan line and data line in display panel can be normal
Display drive signals are exported, display panel shows the dynamic image of high definition, not due to the Vcom voltage in display panel at this time
It is pullled, the control signal that control module 101 generates is second electrical level state, and first switch module 102 turns off, second switch mould
Block 103 is connected, and GND is directly grounded on the left of boost capacitor C1, and the left side voltage of boost capacitor C1 is equal to Vcom voltage, and boost mould
The voltage output end of block 104 directly exports the Vcom voltage of display panel, and there is no play voltage source compensation for boost module 104
Effect.
When the unexpected shutdown moment of gate-control signal in display panel, due in display panel scan line and data line all deposit
In coupled capacitor, then the Vcom voltage in display panel can reduce suddenly；The control signal that control module 101 generates at this time
For the first level state, first switch module 102 is connected, and second switch module 103 turns off, and the left side of boost capacitor C1 directly connects
The Vcom voltage for entering display panel, the electricity according to the principle that the both ends charge of capacitor cannot be mutated, in the left side of boost capacitor C1
Pressure rises to moment of Vcom voltage, and the voltage of the voltage output end of boost module 104 will rise to 2 times of former Vcom voltage,
So after supply voltage of the boost module 104 for display panel carries out boosting compensation, pass through the electricity of boost module 104
Pressure output end exports 2 times that compensated Vcom voltage is exactly former Vcom voltage, and passes through first diode D1 and second
Diode D2 can prevent reverse-conducting between the voltage input end and voltage output end of boost module 104, and then when boosting mould
It, can be by compensated Vcom electricity by the voltage output end of boost module 104 after the voltage output terminal potential of block 104 rises
Pressure output ensures that display panel can be realized more preferably video display effect into display panel；To the liter in the present embodiment
Die block 104 realizes compensation for Vcom voltage in display panel, avoids in display panel gate-control signal in shutdown moment
The problem of causing in display panel image quality to decline since Vcom voltage is pullled, by boost module 104 can in time,
Rapidly the Vcom voltage of display panel is compensated and exported, and then improves the quality of picture in display panel.
Therefore in the present embodiment, boost module 104 can be realized by more simplified circuit structure for Vcom electricity
The boosting compensating operation of pressure passes through the voltage output end energy of boost module 104 when the Vcom voltage in display panel is pullled
Compensated Vcom voltage is enough exported, compatibility is extremely strong, and it is higher for the compensation precision of Vcom voltage in display panel, it improves
The quality of picture in display panel, and significantly reduce in the present embodiment the manufacturing cost of supply voltage compensation circuit 10 and
Application cost brings good usage experience to user.
As an alternative embodiment, Fig. 7 shows the another of supply voltage compensation circuit 10 provided in this embodiment
A kind of modular structure, compared to the modular structure of Vcom voltage compensation circuit 10 shown in Fig. 1, electricity shown in Fig. 7
Source voltage compensating circuit 10 further includes Voltage stabilizing module 701, Voltage stabilizing module 701 be connected to the voltage output end of boost module 104 with
Between ground GND, specifically, the voltage output end of the voltage input output termination boost module 104 of Voltage stabilizing module 701, pressure stabilizing mould
The ground terminal of block 701 is grounded GND；After Vcom voltage of the boost module 104 to display panel carries out boosting compensation, pass through liter
The voltage output end of die block 104, that is, exportable compensated Vcom voltage, the present embodiment can be to benefits by boost module 104
Vcom voltage after repaying carries out steady pressure treatment, and then enables the supply voltage compensation circuit 10 in the present embodiment will be more stable
Compensation after Vcom voltage export into display panel, avoid Vcom voltage fluctuating range in display panel excessive, so damage
The physical security of internal electronic component in display panel；To ensure the safe and stable operation of display panel, display panel is improved
The effect that middle video is shown.
As an alternative embodiment, Voltage stabilizing module 701 includes at least one electric capacity of voltage regulation, since capacitor is for electricity
Pressing element has slow adjustment effect, can be realized in the present embodiment by electric capacity of voltage regulation and carry out pressure stabilizing for compensated Vcom voltage
Processing ensures the control stability of supply voltage compensation circuit 10；To which the Voltage stabilizing module 701 in the present embodiment can be extremely simple
The circuit structure of change can enable the voltage output end of Voltage stabilizing module 701 export more stable Vcom voltage, enhance electricity
The control performance of source voltage compensating circuit 10 has ensured the physical security of display panel.
As an alternative embodiment, Fig. 8 shows the circuit structure of Voltage stabilizing module 701 provided in this embodiment,
As shown in figure 8, Voltage stabilizing module 701 includes first capacitor CS1, the voltage output of a termination boost module 104 of first capacitor CS1
The other end at end, first capacitor CS1 is grounded GND；After first capacitor CS1 accesses compensated Vcom voltage, first capacitor CS1
Power good will be played to act on, Vcom voltage after the compensation for avoiding the voltage output end output pulsation of boost module 104 excessive, into
And the Voltage stabilizing module 701 in the present embodiment has overly simplified circuit structure, is conducive to improve supply voltage compensation circuit 10
Compatibility.
As an alternative embodiment, Fig. 9 shows another circuit of Voltage stabilizing module 701 provided in this embodiment
Structure, as shown in figure 9, Voltage stabilizing module 701 includes at least two successively cascade electric capacity of voltage regulation, wherein it is shown in Fig. 9 go out it is steady
In die block 701, the voltage output end of the first termination boost module 104 of first electric capacity of voltage regulation, previous electric capacity of voltage regulation
The first end of the adjacent the latter electric capacity of voltage regulation of second termination, the second end of the last one electric capacity of voltage regulation are grounded GND, and then this reality
Applying Voltage stabilizing module 701 in example can be to the carry out pressure stabilizing operation of Vcom voltage after compensation, due to multiple by multiple electric capacity of voltage regulation
Electric capacity of voltage regulation is stronger for the regulating power of voltage, to improve the stabilization of Vcom voltage in display panel in the present embodiment
Property, it has ensured physical security in display panel, display panel is enable to show image quality more preferably image or video, enhanced
The circuit compatibility of supply voltage compensation circuit 10, so that supply voltage compensation circuit 10 can be suitable for different type
Display panel in, and the Vcom voltage in display panel is compensated.
Figure 10 shows the modular structure of display device 100 provided in this embodiment, as shown in Figure 10, display device 100
Supply voltage compensation circuit 10 and display panel 1001 including display panel as described above, supply voltage compensation circuit 10 with
Display panel 1001 connects, and referring to the embodiment of above-mentioned Fig. 1 to Fig. 9, the supply voltage compensation circuit 10 in the present embodiment can
Boosting compensation is carried out to Vcom voltage in display panel 1001, easy to operate, compatibility is strong, and circuit structure is simple, thus effectively
Ground avoids the problem of picture effect reduces when Vcom voltage is pullled in display panel 1001, passes through compensated Vcom electricity
The video display quality of display panel 1001 in the present embodiment can be improved in pressure, brings good usage experience to user, makes this reality
Applying the display device 100 in example can be compatible with suitable for different industrial circles, and practicability is extremely strong；Efficiently solve traditional skill
Display device is pullled and to cause picture effect to occur abnormal due to the Vcom voltage of display panel in art, and user can not pass through
The acquisition of display device clearly video or image, the bad problem of the usage experience of user.
It should be noted that, in this document, such as first and second etc relational terms are used merely to an entity
Distinguished with another entity, without necessarily requiring or implying between these entities there are any this actual relationship or
Person's sequence.And the terms "include", "comprise" or any other variant are intended to non-exclusive inclusion, so that packet
Include the product of a series of elements or the element that structure is intrinsic.In the absence of more restrictions, by sentence " packet
Include ... " or " including ... " limit element, it is not excluded that at process, method, article or end including the element
There is also other elements in end equipment.In addition, herein, " being greater than ", " being less than ", " being more than " etc. are interpreted as not including this
Number；" more than ", " following ", " within " etc. be interpreted as including this number.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of supply voltage compensation circuit of display panel characterized by comprising
Control module, when the gate-control signal of the display panel is closed, the control module generates the control of the first level state
Signal processed；
First switch module, the control of the first switch module terminate the control module, and the of the first switch module
One conducting terminates the supply voltage output end of the display panel, and the first switch module is the first electricity in the control signal
It is connected when level state；
Second switch module, the control of the second switch module terminate the control module, and the of the second switch module
One conducting terminates the second conduction terminal of the first switch module, and the second conduction terminal ground connection of the second switch module is described
Second switch module is connected when the control signal is second electrical level state；
Boost module, the voltage input of the boost module terminate the supply voltage output end of the display panel, the boosting
The boosting rectifier control of module terminates the second conduction terminal of the first switch module and the first conduction terminal of the second switch module,
The boost module is compensated and is exported to the supply voltage of the display panel when the first switch module is connected.
2. the supply voltage compensation circuit of display panel according to claim 1, which is characterized in that the first switch mould
Block includes at least one first switch tube, and the second switch module includes at least one second switch.
3. the supply voltage compensation circuit of display panel according to claim 2, which is characterized in that the first switch mould
Block includes a first switch tube, and the second switch module includes a second switch；
Wherein, the control electrode of the control electrode of the first switch tube and the second switch is connected to the control module, institute altogether
The the first conducting pole for stating first switch tube connects the supply voltage output end of the display panel, and the second of the first switch tube is led
First conducting of logical pole and the second switch is extremely connected to the boost module, the second conducting pole of the second switch altogether
Ground connection.
4. the supply voltage compensation circuit of display panel according to claim 1, which is characterized in that the control module packet
It includes:
Singlechip chip, the singlechip chip connect the control of the control terminal and the second switch module of the first switch module
End processed, the singlechip chip generate the control signal according to operational order.
5. the supply voltage compensation circuit of display panel according to claim 1, which is characterized in that the control module packet
It includes:
First DC power supply is exported in direct current energy；
The power input of clock circuit, the clock circuit terminates first DC power supply, and the signal of the clock circuit is defeated
The control terminal of the first switch module and the control terminal of the second switch module are terminated out, and the clock circuit generates clock
Signal.
6. the supply voltage compensation circuit of display panel according to claim 1, which is characterized in that the boost module packet
It includes:
Boost capacitor；
First diode；And
Second diode；
Wherein, the anode of the first diode connects the supply voltage output end of the display panel, the first switch module
The second conduction terminal and the first conduction terminal of the second switch module be connected to the first end of the boost capacitor altogether, described first
The anode of the cathode of diode and second diode is connected to the second end of the boost capacitor altogether, second diode
Cathode exports compensated supply voltage.
7. the supply voltage compensation circuit of display panel according to claim 1, which is characterized in that further include:
Voltage stabilizing module, the Voltage stabilizing module are connected between the voltage output end and ground of the boost module, the Voltage stabilizing module
Steady pressure treatment is carried out to compensated supply voltage.
8. the supply voltage compensation circuit of display panel according to claim 7, which is characterized in that the Voltage stabilizing module packet
Include at least one electric capacity of voltage regulation.
9. the supply voltage compensation circuit of display panel according to claim 8, which is characterized in that the Voltage stabilizing module packet
Include first capacitor, the voltage output end of a termination boost module of the first capacitor, the other end of the first capacitor
Ground connection.
10. a kind of display device, which is characterized in that the power supply electricity including such as described in any item display panels of claim 1-9
Press compensation circuit and display panel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821741538.8U CN209015702U (en) | 2018-10-25 | 2018-10-25 | The supply voltage compensation circuit and display device of display panel |
| PCT/CN2018/120075 WO2020082524A1 (en) | 2018-10-25 | 2018-12-10 | Power supply voltage compensation circuit of display panel, display panel, and display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821741538.8U CN209015702U (en) | 2018-10-25 | 2018-10-25 | The supply voltage compensation circuit and display device of display panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209015702U true CN209015702U (en) | 2019-06-21 |
Family
ID=66840062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821741538.8U Active CN209015702U (en) | 2018-10-25 | 2018-10-25 | The supply voltage compensation circuit and display device of display panel |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN209015702U (en) |
| WO (1) | WO2020082524A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111933088A (en) * | 2020-08-19 | 2020-11-13 | 惠科股份有限公司 | Power generation circuit and display device thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101189278B1 (en) * | 2006-04-18 | 2012-10-09 | 삼성디스플레이 주식회사 | Digital to analog convert and driving method for display device |
| CN201207710Y (en) * | 2008-05-20 | 2009-03-11 | 比亚迪股份有限公司 | Communication terminal and communication device |
| CN103474033B (en) * | 2013-08-09 | 2016-06-22 | 京东方科技集团股份有限公司 | Boost control circuit and control method, booster circuit, display device |
| CN106961214A (en) * | 2017-04-17 | 2017-07-18 | 京东方科技集团股份有限公司 | A kind of boost control circuit, its driving method and display device |
| CN107731186B (en) * | 2017-10-31 | 2020-07-31 | 京东方科技集团股份有限公司 | Control circuit, control method and display device |
-
2018
- 2018-10-25 CN CN201821741538.8U patent/CN209015702U/en active Active
- 2018-12-10 WO PCT/CN2018/120075 patent/WO2020082524A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111933088A (en) * | 2020-08-19 | 2020-11-13 | 惠科股份有限公司 | Power generation circuit and display device thereof |
| CN111933088B (en) * | 2020-08-19 | 2021-12-03 | 惠科股份有限公司 | Power generation circuit and display device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020082524A1 (en) | 2020-04-30 |
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